GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Tilt the cab. Refer to Cab Tilting .

  2. Object Number: 1247851  Size: SH
  3. Install a breaker bar to the tensioner.
  4. Rotate the belt tensioner counterclockwise to relieve tension on the belt.

  5. Object Number: 1247848  Size: SH
  6. If equipped with A/C, remove the belt from the pulleys and the tensioner.
  7. Slowly release tension on the belt tensioner.
  8. Remove the breaker bar from the tensioner.
  9. Clean and inspect the surfaces of all the pulleys.

Installation Procedure


    Object Number: 1247851  Size: SH
  1. Route the belt around all the pulleys except the tensioner.
  2. Install the breaker bar to the belt tensioner.
  3. Rotate the tensioner counterclockwise to relieve tension on the tensioner.
  4. Route the belt around the tensioner.

  5. Object Number: 1247848  Size: SH
  6. If equipped with A/C route the drive belt around the tensioner.
  7. Slowly release the tension on the tensioner.
  8. Remove the breaker bar from the tensioner.
  9. Inspect the belt for proper installation and alignment.
  10. Lower the cab.